./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:22:00,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:22:00,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:22:00,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:22:00,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:22:00,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:22:00,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:22:00,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:22:00,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:22:00,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:22:00,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:22:00,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:22:00,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:22:00,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:22:00,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:22:00,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:22:00,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:22:00,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:22:00,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:22:00,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:22:00,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:22:00,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:22:00,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:22:00,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:22:00,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:22:00,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:22:00,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:22:00,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:22:00,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:22:00,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:22:00,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:22:00,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:22:00,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:22:00,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:22:00,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:22:00,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:22:00,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:22:00,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:22:00,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:22:00,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:22:00,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:22:00,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:22:01,011 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:22:01,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:22:01,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:22:01,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:22:01,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:22:01,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:22:01,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:22:01,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:22:01,014 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:22:01,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:22:01,015 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:22:01,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:22:01,017 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:22:01,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:22:01,017 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:22:01,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:22:01,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:22:01,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:22:01,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:22:01,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:22:01,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:22:01,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:22:01,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:22:01,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:22:01,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:22:01,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:22:01,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:22:01,020 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:22:01,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:22:01,020 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:22:01,020 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:22:01,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:22:01,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:22:01,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:22:01,355 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:22:01,355 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:22:01,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 20:22:02,489 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:22:02,688 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:22:02,689 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-30 20:22:02,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f94ecfb7/304505883d5d4d3689896cca4dda67d5/FLAG94558d341 [2023-08-30 20:22:02,715 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f94ecfb7/304505883d5d4d3689896cca4dda67d5 [2023-08-30 20:22:02,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:22:02,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:22:02,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:22:02,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:22:02,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:22:02,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:02,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749b7dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02, skipping insertion in model container [2023-08-30 20:22:02,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:02,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:22:02,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:22:02,904 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-30 20:22:02,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:22:02,918 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:22:02,938 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-30 20:22:02,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:22:02,953 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:22:02,953 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:22:02,959 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:22:02,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02 WrapperNode [2023-08-30 20:22:02,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:22:02,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:22:02,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:22:02,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:22:02,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:02,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:02,995 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-08-30 20:22:02,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:22:02,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:22:02,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:22:02,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:22:03,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,034 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:22:03,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:22:03,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:22:03,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:22:03,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (1/1) ... [2023-08-30 20:22:03,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:22:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:03,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:22:03,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:22:03,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:22:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:22:03,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:22:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:22:03,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:22:03,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:22:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:22:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:22:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:22:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:22:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:22:03,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:22:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:22:03,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:22:03,143 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:22:03,244 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:22:03,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:22:03,413 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:22:03,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:22:03,480 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 20:22:03,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:22:03 BoogieIcfgContainer [2023-08-30 20:22:03,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:22:03,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:22:03,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:22:03,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:22:03,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:22:02" (1/3) ... [2023-08-30 20:22:03,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a06c16d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:22:03, skipping insertion in model container [2023-08-30 20:22:03,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:22:02" (2/3) ... [2023-08-30 20:22:03,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a06c16d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:22:03, skipping insertion in model container [2023-08-30 20:22:03,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:22:03" (3/3) ... [2023-08-30 20:22:03,490 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-30 20:22:03,498 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:22:03,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:22:03,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:22:03,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:22:03,583 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:22:03,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 162 flow [2023-08-30 20:22:03,669 INFO L130 PetriNetUnfolder]: 5/71 cut-off events. [2023-08-30 20:22:03,670 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:22:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-08-30 20:22:03,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 162 flow [2023-08-30 20:22:03,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-08-30 20:22:03,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:22:03,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 63 transitions, 138 flow [2023-08-30 20:22:03,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 63 transitions, 138 flow [2023-08-30 20:22:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 63 transitions, 138 flow [2023-08-30 20:22:03,711 INFO L130 PetriNetUnfolder]: 5/63 cut-off events. [2023-08-30 20:22:03,711 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:22:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 63 events. 5/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-08-30 20:22:03,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 20:22:05,318 INFO L134 LiptonReduction]: Checked pairs total: 535 [2023-08-30 20:22:05,318 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-30 20:22:05,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:22:05,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48b2b9d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:22:05,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:22:05,341 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 20:22:05,341 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:22:05,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:05,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:05,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:05,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -553565742, now seen corresponding path program 1 times [2023-08-30 20:22:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530499858] [2023-08-30 20:22:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:05,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530499858] [2023-08-30 20:22:05,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530499858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:22:05,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:22:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:22:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112495385] [2023-08-30 20:22:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:22:05,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:22:05,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:22:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:22:05,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-08-30 20:22:05,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:05,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-08-30 20:22:05,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:05,769 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-30 20:22:05,769 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 20:22:05,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 260 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-30 20:22:05,772 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-30 20:22:05,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-30 20:22:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:22:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:22:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-08-30 20:22:05,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-30 20:22:05,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-08-30 20:22:05,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-08-30 20:22:05,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:05,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-08-30 20:22:05,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,803 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 210 transitions. [2023-08-30 20:22:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-30 20:22:05,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:22:05,807 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-30 20:22:05,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-30 20:22:05,811 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-30 20:22:05,812 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-30 20:22:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:22:05,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:05,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1684820141, now seen corresponding path program 1 times [2023-08-30 20:22:05,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:05,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430936252] [2023-08-30 20:22:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:05,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430936252] [2023-08-30 20:22:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430936252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:22:05,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:22:05,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:22:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502674362] [2023-08-30 20:22:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:22:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:22:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:22:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:22:05,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 126 [2023-08-30 20:22:05,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:05,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:05,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 126 [2023-08-30 20:22:05,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:06,073 INFO L130 PetriNetUnfolder]: 76/153 cut-off events. [2023-08-30 20:22:06,074 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 20:22:06,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 153 events. 76/153 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 473 event pairs, 24 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 183. Up to 78 conditions per place. [2023-08-30 20:22:06,075 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-08-30 20:22:06,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 191 flow [2023-08-30 20:22:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:22:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:22:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2023-08-30 20:22:06,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-30 20:22:06,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 312 transitions. [2023-08-30 20:22:06,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 312 transitions. [2023-08-30 20:22:06,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:06,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 312 transitions. [2023-08-30 20:22:06,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,083 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,083 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 312 transitions. [2023-08-30 20:22:06,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 191 flow [2023-08-30 20:22:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:22:06,084 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 70 flow [2023-08-30 20:22:06,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-30 20:22:06,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-30 20:22:06,086 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 70 flow [2023-08-30 20:22:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:06,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:22:06,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:06,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash -298983667, now seen corresponding path program 2 times [2023-08-30 20:22:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542483637] [2023-08-30 20:22:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542483637] [2023-08-30 20:22:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542483637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932032006] [2023-08-30 20:22:06,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:22:06,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:06,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:06,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:22:06,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:22:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:06,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932032006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:06,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:22:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501078417] [2023-08-30 20:22:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:22:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:22:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:22:06,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:06,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 55.625) internal successors, (445), 8 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:06,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:06,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:06,472 INFO L130 PetriNetUnfolder]: 82/158 cut-off events. [2023-08-30 20:22:06,472 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2023-08-30 20:22:06,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 158 events. 82/158 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 492 event pairs, 14 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 143. Up to 90 conditions per place. [2023-08-30 20:22:06,474 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 29 selfloop transitions, 4 changer transitions 5/38 dead transitions. [2023-08-30 20:22:06,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 212 flow [2023-08-30 20:22:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:22:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:22:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 302 transitions. [2023-08-30 20:22:06,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2023-08-30 20:22:06,477 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 302 transitions. [2023-08-30 20:22:06,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 302 transitions. [2023-08-30 20:22:06,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:06,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 302 transitions. [2023-08-30 20:22:06,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,497 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 70 flow. Second operand 5 states and 302 transitions. [2023-08-30 20:22:06,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 212 flow [2023-08-30 20:22:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 20:22:06,499 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 91 flow [2023-08-30 20:22:06,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-30 20:22:06,500 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-30 20:22:06,501 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 91 flow [2023-08-30 20:22:06,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.625) internal successors, (445), 8 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:06,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:06,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:06,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:06,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 435057483, now seen corresponding path program 3 times [2023-08-30 20:22:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861610997] [2023-08-30 20:22:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861610997] [2023-08-30 20:22:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861610997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:22:06,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:22:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:22:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272462664] [2023-08-30 20:22:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:22:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:22:06,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:22:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:22:06,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2023-08-30 20:22:06,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:06,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2023-08-30 20:22:06,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:06,939 INFO L130 PetriNetUnfolder]: 90/179 cut-off events. [2023-08-30 20:22:06,940 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-08-30 20:22:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 179 events. 90/179 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 565 event pairs, 30 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 327. Up to 84 conditions per place. [2023-08-30 20:22:06,944 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 25 selfloop transitions, 6 changer transitions 8/39 dead transitions. [2023-08-30 20:22:06,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 241 flow [2023-08-30 20:22:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:22:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:22:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 306 transitions. [2023-08-30 20:22:06,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-30 20:22:06,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 306 transitions. [2023-08-30 20:22:06,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 306 transitions. [2023-08-30 20:22:06,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:06,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 306 transitions. [2023-08-30 20:22:06,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.2) internal successors, (306), 5 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,952 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 91 flow. Second operand 5 states and 306 transitions. [2023-08-30 20:22:06,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 241 flow [2023-08-30 20:22:06,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:22:06,956 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 129 flow [2023-08-30 20:22:06,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-30 20:22:06,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-08-30 20:22:06,958 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 129 flow [2023-08-30 20:22:06,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:06,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:06,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:06,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:22:06,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:06,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash -431708467, now seen corresponding path program 4 times [2023-08-30 20:22:06,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:06,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219952620] [2023-08-30 20:22:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:06,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219952620] [2023-08-30 20:22:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219952620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:22:07,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:22:07,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:22:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952999842] [2023-08-30 20:22:07,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:22:07,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:22:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:22:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:22:07,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2023-08-30 20:22:07,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:07,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2023-08-30 20:22:07,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:07,134 INFO L130 PetriNetUnfolder]: 81/159 cut-off events. [2023-08-30 20:22:07,134 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-30 20:22:07,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 159 events. 81/159 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 34 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2023-08-30 20:22:07,137 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 22 selfloop transitions, 6 changer transitions 15/43 dead transitions. [2023-08-30 20:22:07,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 306 flow [2023-08-30 20:22:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:22:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:22:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2023-08-30 20:22:07,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2023-08-30 20:22:07,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 362 transitions. [2023-08-30 20:22:07,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 362 transitions. [2023-08-30 20:22:07,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:07,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 362 transitions. [2023-08-30 20:22:07,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.333333333333336) internal successors, (362), 6 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,145 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,145 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 129 flow. Second operand 6 states and 362 transitions. [2023-08-30 20:22:07,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 306 flow [2023-08-30 20:22:07,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 292 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:22:07,150 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 164 flow [2023-08-30 20:22:07,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2023-08-30 20:22:07,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-30 20:22:07,151 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 164 flow [2023-08-30 20:22:07,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:07,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:22:07,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:07,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1652494975, now seen corresponding path program 5 times [2023-08-30 20:22:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087509111] [2023-08-30 20:22:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:07,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087509111] [2023-08-30 20:22:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087509111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359766132] [2023-08-30 20:22:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:22:07,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:07,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:22:07,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:22:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359766132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:07,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:22:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969460280] [2023-08-30 20:22:07,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:22:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:22:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:22:07,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:07,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:07,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:07,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:07,580 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2023-08-30 20:22:07,580 INFO L131 PetriNetUnfolder]: For 432/432 co-relation queries the response was YES. [2023-08-30 20:22:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 156 events. 83/156 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 429 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 468. Up to 100 conditions per place. [2023-08-30 20:22:07,582 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2023-08-30 20:22:07,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 365 flow [2023-08-30 20:22:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:22:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:22:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-30 20:22:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2023-08-30 20:22:07,584 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-30 20:22:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-30 20:22:07,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:07,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-30 20:22:07,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,588 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,588 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 164 flow. Second operand 8 states and 470 transitions. [2023-08-30 20:22:07,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 365 flow [2023-08-30 20:22:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 343 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 20:22:07,591 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 197 flow [2023-08-30 20:22:07,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-30 20:22:07,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-08-30 20:22:07,592 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 197 flow [2023-08-30 20:22:07,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:07,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:07,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:07,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:22:07,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:07,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -971592469, now seen corresponding path program 6 times [2023-08-30 20:22:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989445631] [2023-08-30 20:22:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989445631] [2023-08-30 20:22:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989445631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093991124] [2023-08-30 20:22:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:22:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:07,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:07,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:22:07,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:22:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:22:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093991124] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:07,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:07,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:22:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494072694] [2023-08-30 20:22:07,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:07,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:22:07,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:22:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:22:08,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:08,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 55.3) internal successors, (553), 10 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:08,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:08,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:08,099 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2023-08-30 20:22:08,100 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-30 20:22:08,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 140 events. 75/140 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 509. Up to 87 conditions per place. [2023-08-30 20:22:08,101 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-08-30 20:22:08,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 317 flow [2023-08-30 20:22:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:22:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:22:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-08-30 20:22:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-08-30 20:22:08,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-08-30 20:22:08,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-08-30 20:22:08,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:08,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-08-30 20:22:08,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,108 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 197 flow. Second operand 5 states and 297 transitions. [2023-08-30 20:22:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 317 flow [2023-08-30 20:22:08,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 293 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 20:22:08,111 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 177 flow [2023-08-30 20:22:08,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-08-30 20:22:08,112 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-30 20:22:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 177 flow [2023-08-30 20:22:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 55.3) internal successors, (553), 10 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:08,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:08,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:08,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:08,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash -856446032, now seen corresponding path program 1 times [2023-08-30 20:22:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:08,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473035641] [2023-08-30 20:22:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:08,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473035641] [2023-08-30 20:22:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473035641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718279845] [2023-08-30 20:22:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:08,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:22:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 20:22:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:08,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718279845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:08,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-30 20:22:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406714697] [2023-08-30 20:22:08,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:22:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:22:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:22:08,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-08-30 20:22:08,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:08,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-08-30 20:22:08,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:08,630 INFO L130 PetriNetUnfolder]: 118/222 cut-off events. [2023-08-30 20:22:08,630 INFO L131 PetriNetUnfolder]: For 667/687 co-relation queries the response was YES. [2023-08-30 20:22:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 222 events. 118/222 cut-off events. For 667/687 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 12 based on Foata normal form. 19/235 useless extension candidates. Maximal degree in co-relation 759. Up to 111 conditions per place. [2023-08-30 20:22:08,632 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-30 20:22:08,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 380 flow [2023-08-30 20:22:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:22:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:22:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-08-30 20:22:08,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2023-08-30 20:22:08,633 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-08-30 20:22:08,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-08-30 20:22:08,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:08,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-08-30 20:22:08,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,636 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 177 flow. Second operand 4 states and 283 transitions. [2023-08-30 20:22:08,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 380 flow [2023-08-30 20:22:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 323 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-30 20:22:08,638 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 238 flow [2023-08-30 20:22:08,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-30 20:22:08,639 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-30 20:22:08,639 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 238 flow [2023-08-30 20:22:08,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:08,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:08,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 20:22:08,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:08,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:08,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1694599747, now seen corresponding path program 2 times [2023-08-30 20:22:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230277946] [2023-08-30 20:22:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230277946] [2023-08-30 20:22:08,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230277946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002212786] [2023-08-30 20:22:08,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:22:08,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:08,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:08,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:22:08,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:08,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:09,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002212786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:09,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:22:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772073732] [2023-08-30 20:22:09,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:22:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:22:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:22:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:09,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:09,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:09,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:09,431 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2023-08-30 20:22:09,431 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-08-30 20:22:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 464 events. 236/464 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2004 event pairs, 3 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 666. Up to 157 conditions per place. [2023-08-30 20:22:09,435 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2023-08-30 20:22:09,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 133 transitions, 1027 flow [2023-08-30 20:22:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:22:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:22:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1170 transitions. [2023-08-30 20:22:09,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-08-30 20:22:09,439 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1170 transitions. [2023-08-30 20:22:09,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1170 transitions. [2023-08-30 20:22:09,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:09,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1170 transitions. [2023-08-30 20:22:09,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 58.5) internal successors, (1170), 20 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,447 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,447 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 238 flow. Second operand 20 states and 1170 transitions. [2023-08-30 20:22:09,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 133 transitions, 1027 flow [2023-08-30 20:22:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 133 transitions, 993 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-30 20:22:09,452 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 673 flow [2023-08-30 20:22:09,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-08-30 20:22:09,453 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-08-30 20:22:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 673 flow [2023-08-30 20:22:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:09,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:09,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:09,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:09,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1093790239, now seen corresponding path program 3 times [2023-08-30 20:22:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:09,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229191887] [2023-08-30 20:22:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229191887] [2023-08-30 20:22:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229191887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028989174] [2023-08-30 20:22:09,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:22:09,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:09,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:09,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:22:09,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:22:09,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:09,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:09,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028989174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:09,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:09,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:22:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123122973] [2023-08-30 20:22:09,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:09,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:22:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:22:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:22:09,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:09,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 55.09090909090909) internal successors, (606), 11 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:09,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:09,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:10,074 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2023-08-30 20:22:10,074 INFO L131 PetriNetUnfolder]: For 1897/1897 co-relation queries the response was YES. [2023-08-30 20:22:10,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 505 events. 246/505 cut-off events. For 1897/1897 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2349 event pairs, 21 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2005. Up to 346 conditions per place. [2023-08-30 20:22:10,077 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2023-08-30 20:22:10,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 115 transitions, 1208 flow [2023-08-30 20:22:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:22:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:22:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 419 transitions. [2023-08-30 20:22:10,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47505668934240364 [2023-08-30 20:22:10,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 419 transitions. [2023-08-30 20:22:10,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 419 transitions. [2023-08-30 20:22:10,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:10,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 419 transitions. [2023-08-30 20:22:10,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,082 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 673 flow. Second operand 7 states and 419 transitions. [2023-08-30 20:22:10,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 115 transitions, 1208 flow [2023-08-30 20:22:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 953 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-08-30 20:22:10,093 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 661 flow [2023-08-30 20:22:10,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-08-30 20:22:10,094 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-08-30 20:22:10,094 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 661 flow [2023-08-30 20:22:10,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 55.09090909090909) internal successors, (606), 11 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:10,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:10,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:10,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:10,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 875450143, now seen corresponding path program 4 times [2023-08-30 20:22:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780225766] [2023-08-30 20:22:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780225766] [2023-08-30 20:22:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780225766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240332740] [2023-08-30 20:22:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:22:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:10,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:10,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:22:10,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:22:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:10,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:10,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:10,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240332740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:10,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:10,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:22:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827626786] [2023-08-30 20:22:10,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:10,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:22:10,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:22:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:22:10,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:10,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 661 flow. Second operand has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:10,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:10,829 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2023-08-30 20:22:10,829 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-08-30 20:22:10,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 475 events. 232/475 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2259 event pairs, 11 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 1710. Up to 204 conditions per place. [2023-08-30 20:22:10,833 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2023-08-30 20:22:10,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1160 flow [2023-08-30 20:22:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:22:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:22:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 830 transitions. [2023-08-30 20:22:10,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47052154195011336 [2023-08-30 20:22:10,836 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 830 transitions. [2023-08-30 20:22:10,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 830 transitions. [2023-08-30 20:22:10,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:10,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 830 transitions. [2023-08-30 20:22:10,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.285714285714285) internal successors, (830), 14 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,841 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,841 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 661 flow. Second operand 14 states and 830 transitions. [2023-08-30 20:22:10,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1160 flow [2023-08-30 20:22:10,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 129 transitions, 1079 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-08-30 20:22:10,851 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 756 flow [2023-08-30 20:22:10,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-30 20:22:10,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-08-30 20:22:10,852 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 756 flow [2023-08-30 20:22:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.25) internal successors, (663), 12 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:10,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:10,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:11,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:11,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -862014729, now seen corresponding path program 5 times [2023-08-30 20:22:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176140688] [2023-08-30 20:22:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:11,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:11,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176140688] [2023-08-30 20:22:11,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176140688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528007771] [2023-08-30 20:22:11,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:22:11,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:11,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:11,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:22:11,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:22:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:11,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528007771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:11,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:22:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297489924] [2023-08-30 20:22:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:22:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:22:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:22:11,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:11,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 756 flow. Second operand has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:11,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:11,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:11,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:11,608 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2023-08-30 20:22:11,608 INFO L131 PetriNetUnfolder]: For 2190/2190 co-relation queries the response was YES. [2023-08-30 20:22:11,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 606 events. 294/606 cut-off events. For 2190/2190 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2988 event pairs, 63 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2237. Up to 320 conditions per place. [2023-08-30 20:22:11,612 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2023-08-30 20:22:11,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1536 flow [2023-08-30 20:22:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:22:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:22:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 780 transitions. [2023-08-30 20:22:11,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-08-30 20:22:11,615 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 780 transitions. [2023-08-30 20:22:11,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 780 transitions. [2023-08-30 20:22:11,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:11,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 780 transitions. [2023-08-30 20:22:11,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.0) internal successors, (780), 13 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:11,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:11,620 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:11,620 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 756 flow. Second operand 13 states and 780 transitions. [2023-08-30 20:22:11,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1536 flow [2023-08-30 20:22:11,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 155 transitions, 1481 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 20:22:11,630 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 1164 flow [2023-08-30 20:22:11,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1164, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-08-30 20:22:11,631 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-08-30 20:22:11,631 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 1164 flow [2023-08-30 20:22:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:11,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:11,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:11,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:11,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:22:11,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:11,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1875695203, now seen corresponding path program 6 times [2023-08-30 20:22:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160511846] [2023-08-30 20:22:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160511846] [2023-08-30 20:22:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160511846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868382502] [2023-08-30 20:22:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:22:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:11,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:11,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:22:11,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:22:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:12,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:12,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868382502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:12,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:12,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:22:12,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870358415] [2023-08-30 20:22:12,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:12,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:22:12,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:22:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:22:12,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:12,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 1164 flow. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:12,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:12,390 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2023-08-30 20:22:12,391 INFO L131 PetriNetUnfolder]: For 4210/4210 co-relation queries the response was YES. [2023-08-30 20:22:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 631 events. 309/631 cut-off events. For 4210/4210 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3138 event pairs, 32 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 2877. Up to 177 conditions per place. [2023-08-30 20:22:12,396 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2023-08-30 20:22:12,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1906 flow [2023-08-30 20:22:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:22:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:22:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 987 transitions. [2023-08-30 20:22:12,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-08-30 20:22:12,399 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 987 transitions. [2023-08-30 20:22:12,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 987 transitions. [2023-08-30 20:22:12,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:12,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 987 transitions. [2023-08-30 20:22:12,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 58.05882352941177) internal successors, (987), 17 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,406 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,406 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 1164 flow. Second operand 17 states and 987 transitions. [2023-08-30 20:22:12,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1906 flow [2023-08-30 20:22:12,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1674 flow, removed 105 selfloop flow, removed 3 redundant places. [2023-08-30 20:22:12,424 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1294 flow [2023-08-30 20:22:12,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2023-08-30 20:22:12,424 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-08-30 20:22:12,425 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1294 flow [2023-08-30 20:22:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:12,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:12,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:12,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:22:12,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:12,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1755297934, now seen corresponding path program 7 times [2023-08-30 20:22:12,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:12,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777659123] [2023-08-30 20:22:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:12,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:12,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777659123] [2023-08-30 20:22:12,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777659123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:12,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787394426] [2023-08-30 20:22:12,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:22:12,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:12,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:12,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:12,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:22:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 20:22:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:12,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787394426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:12,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-30 20:22:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401323780] [2023-08-30 20:22:12,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:22:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:22:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:22:12,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-08-30 20:22:12,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:12,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:12,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-08-30 20:22:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:13,054 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2023-08-30 20:22:13,054 INFO L131 PetriNetUnfolder]: For 6835/6846 co-relation queries the response was YES. [2023-08-30 20:22:13,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5774 conditions, 1068 events. 525/1068 cut-off events. For 6835/6846 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6186 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5470. Up to 464 conditions per place. [2023-08-30 20:22:13,062 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2023-08-30 20:22:13,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 236 transitions, 2948 flow [2023-08-30 20:22:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:22:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:22:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2023-08-30 20:22:13,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2023-08-30 20:22:13,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 356 transitions. [2023-08-30 20:22:13,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 356 transitions. [2023-08-30 20:22:13,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:13,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 356 transitions. [2023-08-30 20:22:13,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:13,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:13,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:13,066 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1294 flow. Second operand 5 states and 356 transitions. [2023-08-30 20:22:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 236 transitions, 2948 flow [2023-08-30 20:22:13,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 236 transitions, 2774 flow, removed 68 selfloop flow, removed 3 redundant places. [2023-08-30 20:22:13,093 INFO L231 Difference]: Finished difference. Result has 111 places, 154 transitions, 1950 flow [2023-08-30 20:22:13,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1950, PETRI_PLACES=111, PETRI_TRANSITIONS=154} [2023-08-30 20:22:13,094 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-08-30 20:22:13,094 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 154 transitions, 1950 flow [2023-08-30 20:22:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:13,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:13,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:22:13,300 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:13,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 717592001, now seen corresponding path program 8 times [2023-08-30 20:22:13,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:13,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303901418] [2023-08-30 20:22:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:13,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303901418] [2023-08-30 20:22:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303901418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971090811] [2023-08-30 20:22:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:22:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:13,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:13,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:22:13,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:13,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:13,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971090811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:13,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:13,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 20:22:13,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955579393] [2023-08-30 20:22:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:22:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:22:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:22:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:13,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 154 transitions, 1950 flow. Second operand has 15 states, 15 states have (on average 54.86666666666667) internal successors, (823), 15 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:13,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:13,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:14,352 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2023-08-30 20:22:14,352 INFO L131 PetriNetUnfolder]: For 12423/12423 co-relation queries the response was YES. [2023-08-30 20:22:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8575 conditions, 1466 events. 680/1466 cut-off events. For 12423/12423 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9563 event pairs, 15 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8303. Up to 331 conditions per place. [2023-08-30 20:22:14,366 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2023-08-30 20:22:14,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 329 transitions, 4265 flow [2023-08-30 20:22:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:22:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:22:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1923 transitions. [2023-08-30 20:22:14,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624819624819625 [2023-08-30 20:22:14,369 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1923 transitions. [2023-08-30 20:22:14,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1923 transitions. [2023-08-30 20:22:14,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:14,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1923 transitions. [2023-08-30 20:22:14,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.27272727272727) internal successors, (1923), 33 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:14,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:14,378 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:14,378 INFO L175 Difference]: Start difference. First operand has 111 places, 154 transitions, 1950 flow. Second operand 33 states and 1923 transitions. [2023-08-30 20:22:14,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 329 transitions, 4265 flow [2023-08-30 20:22:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 329 transitions, 4097 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-08-30 20:22:14,432 INFO L231 Difference]: Finished difference. Result has 155 places, 224 transitions, 3489 flow [2023-08-30 20:22:14,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3489, PETRI_PLACES=155, PETRI_TRANSITIONS=224} [2023-08-30 20:22:14,433 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-08-30 20:22:14,433 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 224 transitions, 3489 flow [2023-08-30 20:22:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.86666666666667) internal successors, (823), 15 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:14,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:14,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:22:14,641 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:14,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 694726189, now seen corresponding path program 9 times [2023-08-30 20:22:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544096661] [2023-08-30 20:22:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:14,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544096661] [2023-08-30 20:22:14,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544096661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:14,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215929220] [2023-08-30 20:22:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:22:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:14,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:14,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:22:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:22:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215929220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:14,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:14,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-30 20:22:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961786664] [2023-08-30 20:22:14,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:22:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:22:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:22:14,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:14,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 224 transitions, 3489 flow. Second operand has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:14,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:14,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:14,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:15,370 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2023-08-30 20:22:15,371 INFO L131 PetriNetUnfolder]: For 23775/23775 co-relation queries the response was YES. [2023-08-30 20:22:15,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11155 conditions, 1617 events. 767/1617 cut-off events. For 23775/23775 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10612 event pairs, 95 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 10864. Up to 1257 conditions per place. [2023-08-30 20:22:15,388 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2023-08-30 20:22:15,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 313 transitions, 5327 flow [2023-08-30 20:22:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:22:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:22:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 537 transitions. [2023-08-30 20:22:15,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2023-08-30 20:22:15,390 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 537 transitions. [2023-08-30 20:22:15,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 537 transitions. [2023-08-30 20:22:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:15,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 537 transitions. [2023-08-30 20:22:15,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 59.666666666666664) internal successors, (537), 9 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:15,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:15,396 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:15,396 INFO L175 Difference]: Start difference. First operand has 155 places, 224 transitions, 3489 flow. Second operand 9 states and 537 transitions. [2023-08-30 20:22:15,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 313 transitions, 5327 flow [2023-08-30 20:22:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 313 transitions, 4341 flow, removed 418 selfloop flow, removed 12 redundant places. [2023-08-30 20:22:15,559 INFO L231 Difference]: Finished difference. Result has 153 places, 252 transitions, 3402 flow [2023-08-30 20:22:15,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3402, PETRI_PLACES=153, PETRI_TRANSITIONS=252} [2023-08-30 20:22:15,560 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-30 20:22:15,560 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 252 transitions, 3402 flow [2023-08-30 20:22:15,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.857142857142854) internal successors, (768), 14 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:15,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:15,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:15,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:22:15,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:15,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -462692187, now seen corresponding path program 10 times [2023-08-30 20:22:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000125426] [2023-08-30 20:22:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000125426] [2023-08-30 20:22:15,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000125426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679367787] [2023-08-30 20:22:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:22:15,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:15,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:15,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:22:15,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:22:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:15,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679367787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:16,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 20:22:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289051307] [2023-08-30 20:22:16,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:22:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:22:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:22:16,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:16,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 252 transitions, 3402 flow. Second operand has 16 states, 16 states have (on average 54.9375) internal successors, (879), 16 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:16,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:16,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:16,617 INFO L130 PetriNetUnfolder]: 934/1910 cut-off events. [2023-08-30 20:22:16,617 INFO L131 PetriNetUnfolder]: For 27065/27065 co-relation queries the response was YES. [2023-08-30 20:22:16,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 1910 events. 934/1910 cut-off events. For 27065/27065 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12701 event pairs, 81 based on Foata normal form. 78/1988 useless extension candidates. Maximal degree in co-relation 12100. Up to 1501 conditions per place. [2023-08-30 20:22:16,636 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 271 selfloop transitions, 90 changer transitions 3/364 dead transitions. [2023-08-30 20:22:16,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 364 transitions, 5451 flow [2023-08-30 20:22:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:22:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:22:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 828 transitions. [2023-08-30 20:22:16,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2023-08-30 20:22:16,639 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 828 transitions. [2023-08-30 20:22:16,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 828 transitions. [2023-08-30 20:22:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:16,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 828 transitions. [2023-08-30 20:22:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.142857142857146) internal successors, (828), 14 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,644 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,644 INFO L175 Difference]: Start difference. First operand has 153 places, 252 transitions, 3402 flow. Second operand 14 states and 828 transitions. [2023-08-30 20:22:16,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 364 transitions, 5451 flow [2023-08-30 20:22:16,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 364 transitions, 5377 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 20:22:16,802 INFO L231 Difference]: Finished difference. Result has 167 places, 300 transitions, 4482 flow [2023-08-30 20:22:16,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4482, PETRI_PLACES=167, PETRI_TRANSITIONS=300} [2023-08-30 20:22:16,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2023-08-30 20:22:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 300 transitions, 4482 flow [2023-08-30 20:22:16,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.9375) internal successors, (879), 16 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:16,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 20:22:17,010 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:17,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2059593163, now seen corresponding path program 11 times [2023-08-30 20:22:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354051302] [2023-08-30 20:22:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354051302] [2023-08-30 20:22:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354051302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761826860] [2023-08-30 20:22:17,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:22:17,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:17,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:17,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:17,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:22:17,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:22:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761826860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:17,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:17,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 20:22:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151680371] [2023-08-30 20:22:17,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:22:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:22:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:22:17,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:17,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 300 transitions, 4482 flow. Second operand has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:17,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:17,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:18,090 INFO L130 PetriNetUnfolder]: 898/1821 cut-off events. [2023-08-30 20:22:18,091 INFO L131 PetriNetUnfolder]: For 29203/29203 co-relation queries the response was YES. [2023-08-30 20:22:18,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12625 conditions, 1821 events. 898/1821 cut-off events. For 29203/29203 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11848 event pairs, 45 based on Foata normal form. 62/1883 useless extension candidates. Maximal degree in co-relation 12330. Up to 592 conditions per place. [2023-08-30 20:22:18,117 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 178 selfloop transitions, 189 changer transitions 1/368 dead transitions. [2023-08-30 20:22:18,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 368 transitions, 5690 flow [2023-08-30 20:22:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:22:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:22:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1294 transitions. [2023-08-30 20:22:18,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668109668109668 [2023-08-30 20:22:18,120 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1294 transitions. [2023-08-30 20:22:18,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1294 transitions. [2023-08-30 20:22:18,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:18,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1294 transitions. [2023-08-30 20:22:18,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.81818181818182) internal successors, (1294), 22 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:18,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:18,128 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:18,128 INFO L175 Difference]: Start difference. First operand has 167 places, 300 transitions, 4482 flow. Second operand 22 states and 1294 transitions. [2023-08-30 20:22:18,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 368 transitions, 5690 flow [2023-08-30 20:22:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 368 transitions, 5453 flow, removed 100 selfloop flow, removed 7 redundant places. [2023-08-30 20:22:18,300 INFO L231 Difference]: Finished difference. Result has 182 places, 297 transitions, 4752 flow [2023-08-30 20:22:18,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4752, PETRI_PLACES=182, PETRI_TRANSITIONS=297} [2023-08-30 20:22:18,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-08-30 20:22:18,301 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 297 transitions, 4752 flow [2023-08-30 20:22:18,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.8) internal successors, (822), 15 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:18,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:18,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:18,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:18,508 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:18,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 306499919, now seen corresponding path program 12 times [2023-08-30 20:22:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014208912] [2023-08-30 20:22:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014208912] [2023-08-30 20:22:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014208912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:18,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615510587] [2023-08-30 20:22:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:22:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:18,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:18,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:22:18,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:22:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:18,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615510587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:18,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:18,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-30 20:22:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31874794] [2023-08-30 20:22:18,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:22:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:22:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:22:18,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:18,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 297 transitions, 4752 flow. Second operand has 15 states, 15 states have (on average 55.06666666666667) internal successors, (826), 15 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:18,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:18,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:19,694 INFO L130 PetriNetUnfolder]: 1322/2652 cut-off events. [2023-08-30 20:22:19,694 INFO L131 PetriNetUnfolder]: For 42197/42197 co-relation queries the response was YES. [2023-08-30 20:22:19,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 2652 events. 1322/2652 cut-off events. For 42197/42197 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18444 event pairs, 73 based on Foata normal form. 74/2726 useless extension candidates. Maximal degree in co-relation 18852. Up to 1100 conditions per place. [2023-08-30 20:22:19,721 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 245 selfloop transitions, 274 changer transitions 8/527 dead transitions. [2023-08-30 20:22:19,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 527 transitions, 9054 flow [2023-08-30 20:22:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:22:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:22:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1239 transitions. [2023-08-30 20:22:19,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2023-08-30 20:22:19,724 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1239 transitions. [2023-08-30 20:22:19,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1239 transitions. [2023-08-30 20:22:19,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:19,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1239 transitions. [2023-08-30 20:22:19,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.0) internal successors, (1239), 21 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:19,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:19,791 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:19,791 INFO L175 Difference]: Start difference. First operand has 182 places, 297 transitions, 4752 flow. Second operand 21 states and 1239 transitions. [2023-08-30 20:22:19,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 527 transitions, 9054 flow [2023-08-30 20:22:19,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 527 transitions, 8656 flow, removed 67 selfloop flow, removed 16 redundant places. [2023-08-30 20:22:20,005 INFO L231 Difference]: Finished difference. Result has 194 places, 431 transitions, 7829 flow [2023-08-30 20:22:20,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7829, PETRI_PLACES=194, PETRI_TRANSITIONS=431} [2023-08-30 20:22:20,006 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-30 20:22:20,006 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 431 transitions, 7829 flow [2023-08-30 20:22:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.06666666666667) internal successors, (826), 15 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:20,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:20,007 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:20,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 20:22:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:20,207 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:20,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash 824419987, now seen corresponding path program 13 times [2023-08-30 20:22:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562057654] [2023-08-30 20:22:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562057654] [2023-08-30 20:22:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562057654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002546026] [2023-08-30 20:22:20,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:22:20,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:20,301 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:20,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:22:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:20,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:20,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002546026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:20,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 20:22:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446355936] [2023-08-30 20:22:20,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:22:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:22:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:22:20,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:20,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 431 transitions, 7829 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:20,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:20,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:20,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:21,484 INFO L130 PetriNetUnfolder]: 1429/2857 cut-off events. [2023-08-30 20:22:21,484 INFO L131 PetriNetUnfolder]: For 62333/62333 co-relation queries the response was YES. [2023-08-30 20:22:21,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 2857 events. 1429/2857 cut-off events. For 62333/62333 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19981 event pairs, 422 based on Foata normal form. 104/2961 useless extension candidates. Maximal degree in co-relation 22294. Up to 2077 conditions per place. [2023-08-30 20:22:21,510 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 424 selfloop transitions, 133 changer transitions 14/571 dead transitions. [2023-08-30 20:22:21,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 571 transitions, 10771 flow [2023-08-30 20:22:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:22:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:22:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1254 transitions. [2023-08-30 20:22:21,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47392290249433106 [2023-08-30 20:22:21,513 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1254 transitions. [2023-08-30 20:22:21,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1254 transitions. [2023-08-30 20:22:21,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:21,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1254 transitions. [2023-08-30 20:22:21,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:21,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:21,518 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:21,518 INFO L175 Difference]: Start difference. First operand has 194 places, 431 transitions, 7829 flow. Second operand 21 states and 1254 transitions. [2023-08-30 20:22:21,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 571 transitions, 10771 flow [2023-08-30 20:22:21,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 571 transitions, 10358 flow, removed 180 selfloop flow, removed 8 redundant places. [2023-08-30 20:22:21,898 INFO L231 Difference]: Finished difference. Result has 216 places, 482 transitions, 9144 flow [2023-08-30 20:22:21,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9144, PETRI_PLACES=216, PETRI_TRANSITIONS=482} [2023-08-30 20:22:21,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-08-30 20:22:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 482 transitions, 9144 flow [2023-08-30 20:22:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:21,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:22,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:22,105 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:22,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1134645313, now seen corresponding path program 14 times [2023-08-30 20:22:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604377555] [2023-08-30 20:22:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:22,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604377555] [2023-08-30 20:22:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604377555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210699717] [2023-08-30 20:22:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:22:22,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:22,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:22,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:22,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:22:22,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:22,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:22:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:22,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210699717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:22,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-30 20:22:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107840590] [2023-08-30 20:22:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:22:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:22:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:22:22,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:22,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 482 transitions, 9144 flow. Second operand has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:22,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:22,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:22,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:23,366 INFO L130 PetriNetUnfolder]: 1464/2908 cut-off events. [2023-08-30 20:22:23,366 INFO L131 PetriNetUnfolder]: For 69173/69173 co-relation queries the response was YES. [2023-08-30 20:22:23,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 2908 events. 1464/2908 cut-off events. For 69173/69173 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20342 event pairs, 155 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 23182. Up to 922 conditions per place. [2023-08-30 20:22:23,391 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 298 selfloop transitions, 271 changer transitions 11/580 dead transitions. [2023-08-30 20:22:23,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 580 transitions, 11436 flow [2023-08-30 20:22:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:22:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:22:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1499 transitions. [2023-08-30 20:22:23,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45757020757020755 [2023-08-30 20:22:23,395 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1499 transitions. [2023-08-30 20:22:23,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1499 transitions. [2023-08-30 20:22:23,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:23,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1499 transitions. [2023-08-30 20:22:23,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.65384615384615) internal successors, (1499), 26 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:23,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:23,401 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:23,401 INFO L175 Difference]: Start difference. First operand has 216 places, 482 transitions, 9144 flow. Second operand 26 states and 1499 transitions. [2023-08-30 20:22:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 580 transitions, 11436 flow [2023-08-30 20:22:23,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 580 transitions, 10269 flow, removed 579 selfloop flow, removed 3 redundant places. [2023-08-30 20:22:23,988 INFO L231 Difference]: Finished difference. Result has 242 places, 515 transitions, 9316 flow [2023-08-30 20:22:23,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9316, PETRI_PLACES=242, PETRI_TRANSITIONS=515} [2023-08-30 20:22:23,989 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-30 20:22:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 515 transitions, 9316 flow [2023-08-30 20:22:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:23,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:24,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:24,190 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:24,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1355573420, now seen corresponding path program 15 times [2023-08-30 20:22:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944339337] [2023-08-30 20:22:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:24,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:24,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944339337] [2023-08-30 20:22:24,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944339337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320161381] [2023-08-30 20:22:24,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:22:24,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:24,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:24,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:22:24,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:22:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 20:22:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:24,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:24,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320161381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:24,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-30 20:22:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581657081] [2023-08-30 20:22:24,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 20:22:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 20:22:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 20:22:24,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-08-30 20:22:24,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 515 transitions, 9316 flow. Second operand has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:24,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:24,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-08-30 20:22:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:25,468 INFO L130 PetriNetUnfolder]: 2182/4290 cut-off events. [2023-08-30 20:22:25,468 INFO L131 PetriNetUnfolder]: For 92299/92309 co-relation queries the response was YES. [2023-08-30 20:22:25,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34579 conditions, 4290 events. 2182/4290 cut-off events. For 92299/92309 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32229 event pairs, 185 based on Foata normal form. 35/4323 useless extension candidates. Maximal degree in co-relation 33385. Up to 2162 conditions per place. [2023-08-30 20:22:25,504 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 469 selfloop transitions, 286 changer transitions 101/864 dead transitions. [2023-08-30 20:22:25,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 864 transitions, 16916 flow [2023-08-30 20:22:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:22:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:22:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2023-08-30 20:22:25,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2023-08-30 20:22:25,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2023-08-30 20:22:25,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2023-08-30 20:22:25,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:25,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2023-08-30 20:22:25,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:25,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:25,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:25,509 INFO L175 Difference]: Start difference. First operand has 242 places, 515 transitions, 9316 flow. Second operand 6 states and 429 transitions. [2023-08-30 20:22:25,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 864 transitions, 16916 flow [2023-08-30 20:22:26,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 864 transitions, 16372 flow, removed 222 selfloop flow, removed 8 redundant places. [2023-08-30 20:22:26,179 INFO L231 Difference]: Finished difference. Result has 242 places, 684 transitions, 13471 flow [2023-08-30 20:22:26,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13471, PETRI_PLACES=242, PETRI_TRANSITIONS=684} [2023-08-30 20:22:26,180 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-30 20:22:26,180 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 684 transitions, 13471 flow [2023-08-30 20:22:26,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.83333333333333) internal successors, (389), 6 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:26,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:26,180 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:26,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:26,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:26,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 937724473, now seen corresponding path program 16 times [2023-08-30 20:22:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:26,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763441582] [2023-08-30 20:22:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:26,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763441582] [2023-08-30 20:22:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763441582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227788641] [2023-08-30 20:22:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:22:26,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:26,491 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:26,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:22:26,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:22:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:26,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:26,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227788641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:26,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-08-30 20:22:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760618794] [2023-08-30 20:22:26,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:22:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:22:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:22:26,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:26,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 684 transitions, 13471 flow. Second operand has 17 states, 17 states have (on average 54.88235294117647) internal successors, (933), 17 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:26,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:26,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:26,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:28,196 INFO L130 PetriNetUnfolder]: 2484/4916 cut-off events. [2023-08-30 20:22:28,196 INFO L131 PetriNetUnfolder]: For 122289/122289 co-relation queries the response was YES. [2023-08-30 20:22:28,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42195 conditions, 4916 events. 2484/4916 cut-off events. For 122289/122289 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38076 event pairs, 185 based on Foata normal form. 50/4966 useless extension candidates. Maximal degree in co-relation 40527. Up to 3712 conditions per place. [2023-08-30 20:22:28,247 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 697 selfloop transitions, 187 changer transitions 49/933 dead transitions. [2023-08-30 20:22:28,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 933 transitions, 19844 flow [2023-08-30 20:22:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:22:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:22:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 660 transitions. [2023-08-30 20:22:28,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-08-30 20:22:28,249 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 660 transitions. [2023-08-30 20:22:28,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 660 transitions. [2023-08-30 20:22:28,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:28,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 660 transitions. [2023-08-30 20:22:28,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.0) internal successors, (660), 11 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:28,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:28,252 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:28,252 INFO L175 Difference]: Start difference. First operand has 242 places, 684 transitions, 13471 flow. Second operand 11 states and 660 transitions. [2023-08-30 20:22:28,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 933 transitions, 19844 flow [2023-08-30 20:22:29,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 933 transitions, 19424 flow, removed 210 selfloop flow, removed 0 redundant places. [2023-08-30 20:22:29,290 INFO L231 Difference]: Finished difference. Result has 258 places, 808 transitions, 16838 flow [2023-08-30 20:22:29,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=13109, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16838, PETRI_PLACES=258, PETRI_TRANSITIONS=808} [2023-08-30 20:22:29,291 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-08-30 20:22:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 808 transitions, 16838 flow [2023-08-30 20:22:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.88235294117647) internal successors, (933), 17 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:29,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:29,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 20:22:29,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:29,492 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:29,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 778832195, now seen corresponding path program 17 times [2023-08-30 20:22:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536056755] [2023-08-30 20:22:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536056755] [2023-08-30 20:22:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536056755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666584141] [2023-08-30 20:22:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:22:29,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:29,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:29,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:22:29,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:22:29,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666584141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:29,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-30 20:22:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953584208] [2023-08-30 20:22:29,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:22:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:22:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:22:29,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:29,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 808 transitions, 16838 flow. Second operand has 19 states, 19 states have (on average 54.63157894736842) internal successors, (1038), 19 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:29,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:29,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:29,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:31,573 INFO L130 PetriNetUnfolder]: 2839/5577 cut-off events. [2023-08-30 20:22:31,573 INFO L131 PetriNetUnfolder]: For 152962/152962 co-relation queries the response was YES. [2023-08-30 20:22:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49100 conditions, 5577 events. 2839/5577 cut-off events. For 152962/152962 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 43575 event pairs, 215 based on Foata normal form. 84/5661 useless extension candidates. Maximal degree in co-relation 47417. Up to 4193 conditions per place. [2023-08-30 20:22:31,748 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 763 selfloop transitions, 252 changer transitions 16/1031 dead transitions. [2023-08-30 20:22:31,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1031 transitions, 22755 flow [2023-08-30 20:22:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:22:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:22:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1008 transitions. [2023-08-30 20:22:31,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-08-30 20:22:31,752 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1008 transitions. [2023-08-30 20:22:31,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1008 transitions. [2023-08-30 20:22:31,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:31,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1008 transitions. [2023-08-30 20:22:31,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.294117647058826) internal successors, (1008), 17 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:31,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:31,757 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:31,757 INFO L175 Difference]: Start difference. First operand has 258 places, 808 transitions, 16838 flow. Second operand 17 states and 1008 transitions. [2023-08-30 20:22:31,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1031 transitions, 22755 flow [2023-08-30 20:22:33,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1031 transitions, 22534 flow, removed 93 selfloop flow, removed 4 redundant places. [2023-08-30 20:22:33,293 INFO L231 Difference]: Finished difference. Result has 276 places, 908 transitions, 19905 flow [2023-08-30 20:22:33,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=16691, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19905, PETRI_PLACES=276, PETRI_TRANSITIONS=908} [2023-08-30 20:22:33,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-30 20:22:33,294 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 908 transitions, 19905 flow [2023-08-30 20:22:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.63157894736842) internal successors, (1038), 19 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:33,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:33,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:33,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 20:22:33,500 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:33,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1597199923, now seen corresponding path program 18 times [2023-08-30 20:22:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:33,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902663985] [2023-08-30 20:22:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:33,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902663985] [2023-08-30 20:22:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902663985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488836820] [2023-08-30 20:22:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:22:33,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:33,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:33,612 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:22:33,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 20:22:33,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:33,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488836820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:33,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-30 20:22:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445334179] [2023-08-30 20:22:33,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:33,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:22:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:22:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:22:33,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:33,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 908 transitions, 19905 flow. Second operand has 18 states, 18 states have (on average 54.666666666666664) internal successors, (984), 18 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:33,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:33,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:33,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:36,779 INFO L130 PetriNetUnfolder]: 3334/6619 cut-off events. [2023-08-30 20:22:36,780 INFO L131 PetriNetUnfolder]: For 214686/214686 co-relation queries the response was YES. [2023-08-30 20:22:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61929 conditions, 6619 events. 3334/6619 cut-off events. For 214686/214686 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 53876 event pairs, 71 based on Foata normal form. 28/6647 useless extension candidates. Maximal degree in co-relation 60241. Up to 1804 conditions per place. [2023-08-30 20:22:36,834 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 323 selfloop transitions, 876 changer transitions 45/1244 dead transitions. [2023-08-30 20:22:36,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1244 transitions, 28036 flow [2023-08-30 20:22:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 20:22:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 20:22:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2847 transitions. [2023-08-30 20:22:36,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611273080660836 [2023-08-30 20:22:36,838 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2847 transitions. [2023-08-30 20:22:36,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2847 transitions. [2023-08-30 20:22:36,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:36,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2847 transitions. [2023-08-30 20:22:36,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.10204081632653) internal successors, (2847), 49 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:36,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:36,850 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:36,850 INFO L175 Difference]: Start difference. First operand has 276 places, 908 transitions, 19905 flow. Second operand 49 states and 2847 transitions. [2023-08-30 20:22:36,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1244 transitions, 28036 flow [2023-08-30 20:22:38,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1244 transitions, 27515 flow, removed 235 selfloop flow, removed 5 redundant places. [2023-08-30 20:22:38,851 INFO L231 Difference]: Finished difference. Result has 328 places, 1079 transitions, 26074 flow [2023-08-30 20:22:38,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=19498, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26074, PETRI_PLACES=328, PETRI_TRANSITIONS=1079} [2023-08-30 20:22:38,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2023-08-30 20:22:38,852 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1079 transitions, 26074 flow [2023-08-30 20:22:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.666666666666664) internal successors, (984), 18 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:38,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:38,853 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:38,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 20:22:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 20:22:39,053 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:39,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1546373287, now seen corresponding path program 19 times [2023-08-30 20:22:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:39,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993203239] [2023-08-30 20:22:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:39,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:39,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993203239] [2023-08-30 20:22:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993203239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664155484] [2023-08-30 20:22:39,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:22:39,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:39,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:39,162 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:39,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:22:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:39,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:39,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664155484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:39,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:39,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-30 20:22:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339017807] [2023-08-30 20:22:39,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:39,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:22:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:22:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:22:39,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:39,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1079 transitions, 26074 flow. Second operand has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:39,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:39,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:39,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:42,703 INFO L130 PetriNetUnfolder]: 3740/7309 cut-off events. [2023-08-30 20:22:42,703 INFO L131 PetriNetUnfolder]: For 300889/300889 co-relation queries the response was YES. [2023-08-30 20:22:42,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73417 conditions, 7309 events. 3740/7309 cut-off events. For 300889/300889 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 59672 event pairs, 207 based on Foata normal form. 206/7515 useless extension candidates. Maximal degree in co-relation 71604. Up to 3448 conditions per place. [2023-08-30 20:22:42,772 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 690 selfloop transitions, 666 changer transitions 15/1371 dead transitions. [2023-08-30 20:22:42,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1371 transitions, 34330 flow [2023-08-30 20:22:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 20:22:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 20:22:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1764 transitions. [2023-08-30 20:22:42,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 20:22:42,774 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1764 transitions. [2023-08-30 20:22:42,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1764 transitions. [2023-08-30 20:22:42,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:42,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1764 transitions. [2023-08-30 20:22:42,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.8) internal successors, (1764), 30 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:42,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:42,782 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:42,782 INFO L175 Difference]: Start difference. First operand has 328 places, 1079 transitions, 26074 flow. Second operand 30 states and 1764 transitions. [2023-08-30 20:22:42,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1371 transitions, 34330 flow [2023-08-30 20:22:46,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1371 transitions, 30677 flow, removed 1449 selfloop flow, removed 17 redundant places. [2023-08-30 20:22:46,539 INFO L231 Difference]: Finished difference. Result has 345 places, 1233 transitions, 28990 flow [2023-08-30 20:22:46,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=22899, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28990, PETRI_PLACES=345, PETRI_TRANSITIONS=1233} [2023-08-30 20:22:46,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-08-30 20:22:46,541 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1233 transitions, 28990 flow [2023-08-30 20:22:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:46,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:46,541 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:46,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:46,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 20:22:46,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:46,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash 672632607, now seen corresponding path program 20 times [2023-08-30 20:22:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769553133] [2023-08-30 20:22:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:46,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769553133] [2023-08-30 20:22:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769553133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807919057] [2023-08-30 20:22:46,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:22:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:46,905 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:46,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:22:46,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:22:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:47,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807919057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:47,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-30 20:22:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763863381] [2023-08-30 20:22:47,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:47,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:22:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:22:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:22:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:47,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1233 transitions, 28990 flow. Second operand has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:47,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:47,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:47,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:50,339 INFO L130 PetriNetUnfolder]: 3694/7225 cut-off events. [2023-08-30 20:22:50,339 INFO L131 PetriNetUnfolder]: For 263741/263741 co-relation queries the response was YES. [2023-08-30 20:22:50,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70732 conditions, 7225 events. 3694/7225 cut-off events. For 263741/263741 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 58818 event pairs, 101 based on Foata normal form. 60/7285 useless extension candidates. Maximal degree in co-relation 68916. Up to 2048 conditions per place. [2023-08-30 20:22:50,441 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 423 selfloop transitions, 919 changer transitions 1/1343 dead transitions. [2023-08-30 20:22:50,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1343 transitions, 32618 flow [2023-08-30 20:22:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 20:22:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 20:22:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2050 transitions. [2023-08-30 20:22:50,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46485260770975056 [2023-08-30 20:22:50,445 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2050 transitions. [2023-08-30 20:22:50,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2050 transitions. [2023-08-30 20:22:50,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:50,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2050 transitions. [2023-08-30 20:22:50,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 58.57142857142857) internal successors, (2050), 35 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:50,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:50,454 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:50,454 INFO L175 Difference]: Start difference. First operand has 345 places, 1233 transitions, 28990 flow. Second operand 35 states and 2050 transitions. [2023-08-30 20:22:50,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1343 transitions, 32618 flow [2023-08-30 20:22:55,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1343 transitions, 31888 flow, removed 198 selfloop flow, removed 13 redundant places. [2023-08-30 20:22:55,031 INFO L231 Difference]: Finished difference. Result has 367 places, 1234 transitions, 30706 flow [2023-08-30 20:22:55,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=28114, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30706, PETRI_PLACES=367, PETRI_TRANSITIONS=1234} [2023-08-30 20:22:55,033 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-08-30 20:22:55,033 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1234 transitions, 30706 flow [2023-08-30 20:22:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:55,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:55,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:22:55,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:55,238 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:22:55,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1182775093, now seen corresponding path program 21 times [2023-08-30 20:22:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998252707] [2023-08-30 20:22:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:55,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998252707] [2023-08-30 20:22:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998252707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072260092] [2023-08-30 20:22:55,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:22:55,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:55,345 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:22:55,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:22:55,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:22:55,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:22:55,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:22:55,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:55,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:22:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072260092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:55,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-30 20:22:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650917919] [2023-08-30 20:22:55,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:55,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:22:55,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:22:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:22:55,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:22:55,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1234 transitions, 30706 flow. Second operand has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:55,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:55,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:22:55,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:58,875 INFO L130 PetriNetUnfolder]: 4156/8089 cut-off events. [2023-08-30 20:22:58,875 INFO L131 PetriNetUnfolder]: For 313538/313538 co-relation queries the response was YES. [2023-08-30 20:22:58,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82105 conditions, 8089 events. 4156/8089 cut-off events. For 313538/313538 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 67099 event pairs, 287 based on Foata normal form. 70/8159 useless extension candidates. Maximal degree in co-relation 80288. Up to 5956 conditions per place. [2023-08-30 20:22:58,979 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1100 selfloop transitions, 400 changer transitions 13/1513 dead transitions. [2023-08-30 20:22:58,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1513 transitions, 39593 flow [2023-08-30 20:22:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:22:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:22:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1182 transitions. [2023-08-30 20:22:58,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-08-30 20:22:58,981 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1182 transitions. [2023-08-30 20:22:58,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1182 transitions. [2023-08-30 20:22:58,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:22:58,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1182 transitions. [2023-08-30 20:22:58,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.1) internal successors, (1182), 20 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:58,985 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:58,986 INFO L175 Difference]: Start difference. First operand has 367 places, 1234 transitions, 30706 flow. Second operand 20 states and 1182 transitions. [2023-08-30 20:22:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1513 transitions, 39593 flow [2023-08-30 20:23:04,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1513 transitions, 38437 flow, removed 95 selfloop flow, removed 28 redundant places. [2023-08-30 20:23:04,105 INFO L231 Difference]: Finished difference. Result has 367 places, 1362 transitions, 34706 flow [2023-08-30 20:23:04,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=29714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=34706, PETRI_PLACES=367, PETRI_TRANSITIONS=1362} [2023-08-30 20:23:04,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-08-30 20:23:04,106 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1362 transitions, 34706 flow [2023-08-30 20:23:04,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:04,107 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:04,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 20:23:04,313 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:04,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1739013303, now seen corresponding path program 22 times [2023-08-30 20:23:04,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:04,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033462040] [2023-08-30 20:23:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:04,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033462040] [2023-08-30 20:23:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033462040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072466427] [2023-08-30 20:23:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:23:04,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:04,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:04,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:04,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:23:04,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:23:04,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072466427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:04,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-08-30 20:23:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579973104] [2023-08-30 20:23:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:23:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:23:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:23:04,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:23:04,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1362 transitions, 34706 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:04,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:04,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:23:04,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:09,073 INFO L130 PetriNetUnfolder]: 4560/8863 cut-off events. [2023-08-30 20:23:09,074 INFO L131 PetriNetUnfolder]: For 343867/343867 co-relation queries the response was YES. [2023-08-30 20:23:09,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92152 conditions, 8863 events. 4560/8863 cut-off events. For 343867/343867 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 74796 event pairs, 231 based on Foata normal form. 56/8919 useless extension candidates. Maximal degree in co-relation 90940. Up to 5093 conditions per place. [2023-08-30 20:23:09,189 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 902 selfloop transitions, 762 changer transitions 18/1682 dead transitions. [2023-08-30 20:23:09,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1682 transitions, 44593 flow [2023-08-30 20:23:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 20:23:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 20:23:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1476 transitions. [2023-08-30 20:23:09,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-08-30 20:23:09,192 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1476 transitions. [2023-08-30 20:23:09,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1476 transitions. [2023-08-30 20:23:09,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:09,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1476 transitions. [2023-08-30 20:23:09,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.04) internal successors, (1476), 25 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,197 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:09,197 INFO L175 Difference]: Start difference. First operand has 367 places, 1362 transitions, 34706 flow. Second operand 25 states and 1476 transitions. [2023-08-30 20:23:09,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1682 transitions, 44593 flow [2023-08-30 20:23:14,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1682 transitions, 44322 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-08-30 20:23:14,877 INFO L231 Difference]: Finished difference. Result has 391 places, 1520 transitions, 41276 flow [2023-08-30 20:23:14,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34471, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41276, PETRI_PLACES=391, PETRI_TRANSITIONS=1520} [2023-08-30 20:23:14,879 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-08-30 20:23:14,879 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1520 transitions, 41276 flow [2023-08-30 20:23:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:14,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:14,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:14,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 20:23:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 20:23:15,081 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:15,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash -378475203, now seen corresponding path program 23 times [2023-08-30 20:23:15,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:15,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715370533] [2023-08-30 20:23:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:15,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715370533] [2023-08-30 20:23:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715370533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337366825] [2023-08-30 20:23:15,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:23:15,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:15,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:15,180 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:15,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:23:15,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:23:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:15,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337366825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:15,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:15,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-08-30 20:23:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462397567] [2023-08-30 20:23:15,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:23:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:23:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:23:15,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:23:15,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1520 transitions, 41276 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:15,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:15,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:23:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:19,854 INFO L130 PetriNetUnfolder]: 4794/9325 cut-off events. [2023-08-30 20:23:19,855 INFO L131 PetriNetUnfolder]: For 437003/437003 co-relation queries the response was YES. [2023-08-30 20:23:19,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101177 conditions, 9325 events. 4794/9325 cut-off events. For 437003/437003 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 79305 event pairs, 123 based on Foata normal form. 160/9485 useless extension candidates. Maximal degree in co-relation 99780. Up to 2638 conditions per place. [2023-08-30 20:23:19,970 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 555 selfloop transitions, 1191 changer transitions 17/1763 dead transitions. [2023-08-30 20:23:19,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1763 transitions, 49308 flow [2023-08-30 20:23:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:23:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:23:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1584 transitions. [2023-08-30 20:23:19,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2023-08-30 20:23:19,972 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1584 transitions. [2023-08-30 20:23:19,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1584 transitions. [2023-08-30 20:23:19,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:19,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1584 transitions. [2023-08-30 20:23:19,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.666666666666664) internal successors, (1584), 27 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:19,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:19,976 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:19,976 INFO L175 Difference]: Start difference. First operand has 391 places, 1520 transitions, 41276 flow. Second operand 27 states and 1584 transitions. [2023-08-30 20:23:19,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1763 transitions, 49308 flow [2023-08-30 20:23:26,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1763 transitions, 47812 flow, removed 349 selfloop flow, removed 9 redundant places. [2023-08-30 20:23:27,007 INFO L231 Difference]: Finished difference. Result has 412 places, 1620 transitions, 46601 flow [2023-08-30 20:23:27,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=39850, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46601, PETRI_PLACES=412, PETRI_TRANSITIONS=1620} [2023-08-30 20:23:27,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-30 20:23:27,010 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1620 transitions, 46601 flow [2023-08-30 20:23:27,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:27,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 20:23:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:27,213 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:27,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1543577845, now seen corresponding path program 24 times [2023-08-30 20:23:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:27,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669402352] [2023-08-30 20:23:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669402352] [2023-08-30 20:23:27,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669402352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266359909] [2023-08-30 20:23:27,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:23:27,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:27,325 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:27,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:23:27,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:23:27,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:23:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:27,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266359909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:27,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 20:23:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256122477] [2023-08-30 20:23:27,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:23:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:23:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:23:27,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:23:27,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1620 transitions, 46601 flow. Second operand has 23 states, 23 states have (on average 54.69565217391305) internal successors, (1258), 23 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:27,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:27,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:23:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:23:35,160 INFO L130 PetriNetUnfolder]: 7192/13685 cut-off events. [2023-08-30 20:23:35,160 INFO L131 PetriNetUnfolder]: For 603463/603463 co-relation queries the response was YES. [2023-08-30 20:23:35,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159847 conditions, 13685 events. 7192/13685 cut-off events. For 603463/603463 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 120476 event pairs, 311 based on Foata normal form. 96/13781 useless extension candidates. Maximal degree in co-relation 158012. Up to 7156 conditions per place. [2023-08-30 20:23:35,310 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1398 selfloop transitions, 1222 changer transitions 28/2648 dead transitions. [2023-08-30 20:23:35,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2648 transitions, 81246 flow [2023-08-30 20:23:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 20:23:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 20:23:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1776 transitions. [2023-08-30 20:23:35,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2023-08-30 20:23:35,312 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1776 transitions. [2023-08-30 20:23:35,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1776 transitions. [2023-08-30 20:23:35,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:35,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1776 transitions. [2023-08-30 20:23:35,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.2) internal successors, (1776), 30 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,317 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:35,317 INFO L175 Difference]: Start difference. First operand has 412 places, 1620 transitions, 46601 flow. Second operand 30 states and 1776 transitions. [2023-08-30 20:23:35,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2648 transitions, 81246 flow [2023-08-30 20:23:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 2648 transitions, 80012 flow, removed 359 selfloop flow, removed 16 redundant places. [2023-08-30 20:23:48,044 INFO L231 Difference]: Finished difference. Result has 440 places, 2398 transitions, 75751 flow [2023-08-30 20:23:48,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=45775, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=75751, PETRI_PLACES=440, PETRI_TRANSITIONS=2398} [2023-08-30 20:23:48,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 420 predicate places. [2023-08-30 20:23:48,046 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 2398 transitions, 75751 flow [2023-08-30 20:23:48,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.69565217391305) internal successors, (1258), 23 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:48,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:23:48,047 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:23:48,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 20:23:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:48,253 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:23:48,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:23:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 827009771, now seen corresponding path program 25 times [2023-08-30 20:23:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:23:48,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312668707] [2023-08-30 20:23:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:23:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:23:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:23:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312668707] [2023-08-30 20:23:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312668707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:23:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434903570] [2023-08-30 20:23:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:23:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:23:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:23:48,347 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:23:48,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:23:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:23:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:23:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:23:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:23:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:23:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434903570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:23:48,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:23:48,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-30 20:23:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103545474] [2023-08-30 20:23:48,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:23:48,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:23:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:23:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:23:48,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:23:48,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:23:48,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 2398 transitions, 75751 flow. Second operand has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:48,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:23:48,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:23:48,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:00,652 INFO L130 PetriNetUnfolder]: 8823/16847 cut-off events. [2023-08-30 20:24:00,652 INFO L131 PetriNetUnfolder]: For 927633/927633 co-relation queries the response was YES. [2023-08-30 20:24:00,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205083 conditions, 16847 events. 8823/16847 cut-off events. For 927633/927633 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 153765 event pairs, 215 based on Foata normal form. 210/17057 useless extension candidates. Maximal degree in co-relation 203250. Up to 5130 conditions per place. [2023-08-30 20:24:00,848 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 850 selfloop transitions, 2287 changer transitions 34/3171 dead transitions. [2023-08-30 20:24:00,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 3171 transitions, 102319 flow [2023-08-30 20:24:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 20:24:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 20:24:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1828 transitions. [2023-08-30 20:24:00,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679979518689196 [2023-08-30 20:24:00,850 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1828 transitions. [2023-08-30 20:24:00,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1828 transitions. [2023-08-30 20:24:00,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:00,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1828 transitions. [2023-08-30 20:24:00,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 58.96774193548387) internal successors, (1828), 31 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:00,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:00,855 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:00,855 INFO L175 Difference]: Start difference. First operand has 440 places, 2398 transitions, 75751 flow. Second operand 31 states and 1828 transitions. [2023-08-30 20:24:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 3171 transitions, 102319 flow [2023-08-30 20:24:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 3171 transitions, 100733 flow, removed 767 selfloop flow, removed 5 redundant places. [2023-08-30 20:24:21,345 INFO L231 Difference]: Finished difference. Result has 476 places, 2952 transitions, 99816 flow [2023-08-30 20:24:21,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=74399, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=99816, PETRI_PLACES=476, PETRI_TRANSITIONS=2952} [2023-08-30 20:24:21,347 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-08-30 20:24:21,347 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 2952 transitions, 99816 flow [2023-08-30 20:24:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:21,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:24:21,347 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:24:21,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 20:24:21,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:21,548 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:24:21,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:24:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash 552340077, now seen corresponding path program 26 times [2023-08-30 20:24:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:24:21,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043670297] [2023-08-30 20:24:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:24:21,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:24:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:24:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:21,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:24:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043670297] [2023-08-30 20:24:21,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043670297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:24:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187788282] [2023-08-30 20:24:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:24:21,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:24:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:24:21,657 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:24:21,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:24:21,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:24:21,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:24:21,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:24:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:24:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:21,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:24:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:24:21,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187788282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:24:21,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:24:21,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-30 20:24:21,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055046998] [2023-08-30 20:24:21,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:24:21,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:24:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:24:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:24:21,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:24:21,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:24:21,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 2952 transitions, 99816 flow. Second operand has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:21,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:24:21,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:24:21,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:24:36,593 INFO L130 PetriNetUnfolder]: 8983/17153 cut-off events. [2023-08-30 20:24:36,593 INFO L131 PetriNetUnfolder]: For 1004046/1004046 co-relation queries the response was YES. [2023-08-30 20:24:36,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219236 conditions, 17153 events. 8983/17153 cut-off events. For 1004046/1004046 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 156556 event pairs, 3096 based on Foata normal form. 136/17289 useless extension candidates. Maximal degree in co-relation 217186. Up to 15357 conditions per place. [2023-08-30 20:24:36,950 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 2833 selfloop transitions, 320 changer transitions 43/3196 dead transitions. [2023-08-30 20:24:36,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3196 transitions, 109711 flow [2023-08-30 20:24:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 20:24:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 20:24:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1846 transitions. [2023-08-30 20:24:36,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726062467997952 [2023-08-30 20:24:36,952 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1846 transitions. [2023-08-30 20:24:36,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1846 transitions. [2023-08-30 20:24:36,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:24:36,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1846 transitions. [2023-08-30 20:24:36,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 59.54838709677419) internal successors, (1846), 31 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:36,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:36,957 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:24:36,957 INFO L175 Difference]: Start difference. First operand has 476 places, 2952 transitions, 99816 flow. Second operand 31 states and 1846 transitions. [2023-08-30 20:24:36,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3196 transitions, 109711 flow [2023-08-30 20:25:04,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 3196 transitions, 108232 flow, removed 632 selfloop flow, removed 12 redundant places. [2023-08-30 20:25:04,860 INFO L231 Difference]: Finished difference. Result has 506 places, 3033 transitions, 101263 flow [2023-08-30 20:25:04,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=98337, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=101263, PETRI_PLACES=506, PETRI_TRANSITIONS=3033} [2023-08-30 20:25:04,863 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-30 20:25:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 3033 transitions, 101263 flow [2023-08-30 20:25:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:04,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:25:04,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-30 20:25:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:05,064 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:25:05,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1370707805, now seen corresponding path program 27 times [2023-08-30 20:25:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178732563] [2023-08-30 20:25:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:05,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178732563] [2023-08-30 20:25:05,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178732563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:05,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935240621] [2023-08-30 20:25:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:25:05,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:05,164 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:25:05,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 20:25:05,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 20:25:05,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:25:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:05,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935240621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:05,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-30 20:25:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069585983] [2023-08-30 20:25:05,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:25:05,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:25:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:25:05,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:25:05,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 3033 transitions, 101263 flow. Second operand has 21 states, 21 states have (on average 54.666666666666664) internal successors, (1148), 21 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:05,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:05,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:25:05,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:25:21,325 INFO L130 PetriNetUnfolder]: 9044/17266 cut-off events. [2023-08-30 20:25:21,325 INFO L131 PetriNetUnfolder]: For 982340/982340 co-relation queries the response was YES. [2023-08-30 20:25:21,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221286 conditions, 17266 events. 9044/17266 cut-off events. For 982340/982340 co-relation queries the response was YES. Maximal size of possible extension queue 1422. Compared 157883 event pairs, 1047 based on Foata normal form. 6/17272 useless extension candidates. Maximal degree in co-relation 219328. Up to 6051 conditions per place. [2023-08-30 20:25:21,582 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1887 selfloop transitions, 1293 changer transitions 19/3199 dead transitions. [2023-08-30 20:25:21,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 3199 transitions, 110179 flow [2023-08-30 20:25:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:25:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:25:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2125 transitions. [2023-08-30 20:25:21,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45581295581295583 [2023-08-30 20:25:21,585 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2125 transitions. [2023-08-30 20:25:21,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2125 transitions. [2023-08-30 20:25:21,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:25:21,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2125 transitions. [2023-08-30 20:25:21,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.432432432432435) internal successors, (2125), 37 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:21,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:21,591 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:21,592 INFO L175 Difference]: Start difference. First operand has 506 places, 3033 transitions, 101263 flow. Second operand 37 states and 2125 transitions. [2023-08-30 20:25:21,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 3199 transitions, 110179 flow [2023-08-30 20:25:50,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 3199 transitions, 107760 flow, removed 683 selfloop flow, removed 8 redundant places. [2023-08-30 20:25:50,970 INFO L231 Difference]: Finished difference. Result has 538 places, 3104 transitions, 103243 flow [2023-08-30 20:25:50,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=99106, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=103243, PETRI_PLACES=538, PETRI_TRANSITIONS=3104} [2023-08-30 20:25:50,973 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 518 predicate places. [2023-08-30 20:25:50,973 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 3104 transitions, 103243 flow [2023-08-30 20:25:50,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.666666666666664) internal successors, (1148), 21 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:50,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:50,974 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:25:50,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 20:25:51,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 20:25:51,174 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:25:51,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1617405810, now seen corresponding path program 28 times [2023-08-30 20:25:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510071969] [2023-08-30 20:25:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:25:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510071969] [2023-08-30 20:25:51,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510071969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800773892] [2023-08-30 20:25:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:25:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:51,296 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:25:51,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 20:25:51,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:25:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 20:25:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800773892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:51,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:51,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-08-30 20:25:51,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492989687] [2023-08-30 20:25:51,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:51,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:25:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:25:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:25:51,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2023-08-30 20:25:51,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 3104 transitions, 103243 flow. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:51,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:51,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2023-08-30 20:25:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:26:13,508 INFO L130 PetriNetUnfolder]: 12403/23554 cut-off events. [2023-08-30 20:26:13,508 INFO L131 PetriNetUnfolder]: For 1435159/1435169 co-relation queries the response was YES. [2023-08-30 20:26:13,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304414 conditions, 23554 events. 12403/23554 cut-off events. For 1435159/1435169 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 224381 event pairs, 868 based on Foata normal form. 40/23592 useless extension candidates. Maximal degree in co-relation 301635. Up to 13343 conditions per place. [2023-08-30 20:26:13,935 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 2525 selfloop transitions, 1684 changer transitions 255/4473 dead transitions. [2023-08-30 20:26:13,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 4473 transitions, 152255 flow [2023-08-30 20:26:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:26:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:26:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2023-08-30 20:26:13,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691609977324263 [2023-08-30 20:26:13,936 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2023-08-30 20:26:13,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2023-08-30 20:26:13,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:26:13,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2023-08-30 20:26:13,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:13,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:13,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:13,938 INFO L175 Difference]: Start difference. First operand has 538 places, 3104 transitions, 103243 flow. Second operand 7 states and 502 transitions. [2023-08-30 20:26:13,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 4473 transitions, 152255 flow [2023-08-30 20:26:59,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 4473 transitions, 150505 flow, removed 500 selfloop flow, removed 13 redundant places. [2023-08-30 20:26:59,504 INFO L231 Difference]: Finished difference. Result has 535 places, 4047 transitions, 139725 flow [2023-08-30 20:26:59,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=102268, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139725, PETRI_PLACES=535, PETRI_TRANSITIONS=4047} [2023-08-30 20:26:59,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2023-08-30 20:26:59,507 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 4047 transitions, 139725 flow [2023-08-30 20:26:59,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:26:59,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:26:59,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:26:59,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 20:26:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:26:59,713 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:26:59,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:26:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1426821311, now seen corresponding path program 29 times [2023-08-30 20:26:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:26:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132718566] [2023-08-30 20:26:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:26:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:26:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:26:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:26:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:26:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132718566] [2023-08-30 20:26:59,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132718566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:26:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219102169] [2023-08-30 20:26:59,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:26:59,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:26:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:26:59,855 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:26:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 20:26:59,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:26:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:26:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:26:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:27:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:27:00,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:27:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:27:00,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219102169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:27:00,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:27:00,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-08-30 20:27:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974481661] [2023-08-30 20:27:00,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:27:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:27:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:27:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:27:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:27:00,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:27:00,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 4047 transitions, 139725 flow. Second operand has 20 states, 20 states have (on average 54.75) internal successors, (1095), 20 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:00,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:27:00,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:27:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:27:33,194 INFO L130 PetriNetUnfolder]: 14625/27800 cut-off events. [2023-08-30 20:27:33,195 INFO L131 PetriNetUnfolder]: For 1781125/1781125 co-relation queries the response was YES. [2023-08-30 20:27:33,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376816 conditions, 27800 events. 14625/27800 cut-off events. For 1781125/1781125 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 270041 event pairs, 1153 based on Foata normal form. 80/27880 useless extension candidates. Maximal degree in co-relation 373213. Up to 22727 conditions per place. [2023-08-30 20:27:33,758 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 4191 selfloop transitions, 877 changer transitions 69/5137 dead transitions. [2023-08-30 20:27:33,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5137 transitions, 187665 flow [2023-08-30 20:27:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:27:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:27:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 778 transitions. [2023-08-30 20:27:33,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47496947496947495 [2023-08-30 20:27:33,760 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 778 transitions. [2023-08-30 20:27:33,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 778 transitions. [2023-08-30 20:27:33,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:27:33,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 778 transitions. [2023-08-30 20:27:33,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.84615384615385) internal successors, (778), 13 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:33,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:33,762 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:27:33,762 INFO L175 Difference]: Start difference. First operand has 535 places, 4047 transitions, 139725 flow. Second operand 13 states and 778 transitions. [2023-08-30 20:27:33,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5137 transitions, 187665 flow [2023-08-30 20:28:38,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 5137 transitions, 185601 flow, removed 965 selfloop flow, removed 2 redundant places. [2023-08-30 20:28:38,389 INFO L231 Difference]: Finished difference. Result has 552 places, 4769 transitions, 171341 flow [2023-08-30 20:28:38,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=137738, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=171341, PETRI_PLACES=552, PETRI_TRANSITIONS=4769} [2023-08-30 20:28:38,392 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-08-30 20:28:38,392 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 4769 transitions, 171341 flow [2023-08-30 20:28:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.75) internal successors, (1095), 20 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:28:38,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:28:38,392 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:28:38,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 20:28:38,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:38,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:28:38,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:28:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2068517451, now seen corresponding path program 30 times [2023-08-30 20:28:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:28:38,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035235390] [2023-08-30 20:28:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:28:38,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:28:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:28:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:38,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:28:38,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035235390] [2023-08-30 20:28:38,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035235390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:28:38,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899459828] [2023-08-30 20:28:38,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:28:38,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:28:38,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:28:38,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:28:38,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 20:28:38,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 20:28:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:28:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:28:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:28:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:38,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:28:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:28:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899459828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:28:38,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:28:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-08-30 20:28:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904215155] [2023-08-30 20:28:38,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:28:38,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:28:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:28:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:28:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:28:39,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:28:39,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 4769 transitions, 171341 flow. Second operand has 22 states, 22 states have (on average 54.54545454545455) internal successors, (1200), 22 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:28:39,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:28:39,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:28:39,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:29:30,445 INFO L130 PetriNetUnfolder]: 16093/30512 cut-off events. [2023-08-30 20:29:30,445 INFO L131 PetriNetUnfolder]: For 2000119/2000119 co-relation queries the response was YES. [2023-08-30 20:29:30,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419588 conditions, 30512 events. 16093/30512 cut-off events. For 2000119/2000119 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 298375 event pairs, 1155 based on Foata normal form. 80/30592 useless extension candidates. Maximal degree in co-relation 416209. Up to 23369 conditions per place. [2023-08-30 20:29:31,089 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 4211 selfloop transitions, 1280 changer transitions 20/5511 dead transitions. [2023-08-30 20:29:31,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 5511 transitions, 205790 flow [2023-08-30 20:29:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:29:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:29:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1185 transitions. [2023-08-30 20:29:31,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2023-08-30 20:29:31,091 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1185 transitions. [2023-08-30 20:29:31,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1185 transitions. [2023-08-30 20:29:31,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:29:31,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1185 transitions. [2023-08-30 20:29:31,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.25) internal successors, (1185), 20 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:31,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:31,095 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:29:31,095 INFO L175 Difference]: Start difference. First operand has 552 places, 4769 transitions, 171341 flow. Second operand 20 states and 1185 transitions. [2023-08-30 20:29:31,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 5511 transitions, 205790 flow [2023-08-30 20:30:49,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 5511 transitions, 205416 flow, removed 168 selfloop flow, removed 4 redundant places. [2023-08-30 20:30:49,210 INFO L231 Difference]: Finished difference. Result has 573 places, 5167 transitions, 191064 flow [2023-08-30 20:30:49,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=171057, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=191064, PETRI_PLACES=573, PETRI_TRANSITIONS=5167} [2023-08-30 20:30:49,214 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2023-08-30 20:30:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 5167 transitions, 191064 flow [2023-08-30 20:30:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.54545454545455) internal successors, (1200), 22 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:30:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:30:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:30:49,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 20:30:49,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 20:30:49,415 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:30:49,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:30:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash 78564277, now seen corresponding path program 31 times [2023-08-30 20:30:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:30:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736276051] [2023-08-30 20:30:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:30:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:30:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:30:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:30:49,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:30:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736276051] [2023-08-30 20:30:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736276051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:30:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093885194] [2023-08-30 20:30:49,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:30:49,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:30:49,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:30:49,522 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:30:49,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 20:30:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:30:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:30:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:30:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:30:49,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:30:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:30:49,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093885194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:30:49,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:30:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-08-30 20:30:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478708079] [2023-08-30 20:30:49,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:30:49,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:30:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:30:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:30:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:30:49,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:30:49,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 5167 transitions, 191064 flow. Second operand has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:30:49,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:30:49,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:30:49,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:31:46,235 INFO L130 PetriNetUnfolder]: 16914/32172 cut-off events. [2023-08-30 20:31:46,235 INFO L131 PetriNetUnfolder]: For 2431623/2431623 co-relation queries the response was YES. [2023-08-30 20:31:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450992 conditions, 32172 events. 16914/32172 cut-off events. For 2431623/2431623 co-relation queries the response was YES. Maximal size of possible extension queue 2400. Compared 318567 event pairs, 243 based on Foata normal form. 166/32338 useless extension candidates. Maximal degree in co-relation 447421. Up to 9888 conditions per place. [2023-08-30 20:31:46,937 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1103 selfloop transitions, 4682 changer transitions 65/5850 dead transitions. [2023-08-30 20:31:46,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 5850 transitions, 219720 flow [2023-08-30 20:31:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 20:31:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 20:31:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3015 transitions. [2023-08-30 20:31:46,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469187675070028 [2023-08-30 20:31:46,942 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3015 transitions. [2023-08-30 20:31:46,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3015 transitions. [2023-08-30 20:31:46,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:31:46,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3015 transitions. [2023-08-30 20:31:46,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 59.11764705882353) internal successors, (3015), 51 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:31:46,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:31:46,950 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:31:46,950 INFO L175 Difference]: Start difference. First operand has 573 places, 5167 transitions, 191064 flow. Second operand 51 states and 3015 transitions. [2023-08-30 20:31:46,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 5850 transitions, 219720 flow [2023-08-30 20:33:21,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 5850 transitions, 218315 flow, removed 646 selfloop flow, removed 6 redundant places. [2023-08-30 20:33:21,542 INFO L231 Difference]: Finished difference. Result has 631 places, 5476 transitions, 216145 flow [2023-08-30 20:33:21,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=189765, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=216145, PETRI_PLACES=631, PETRI_TRANSITIONS=5476} [2023-08-30 20:33:21,545 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 611 predicate places. [2023-08-30 20:33:21,545 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 5476 transitions, 216145 flow [2023-08-30 20:33:21,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:21,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:21,545 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:33:21,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 20:33:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 20:33:21,746 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:33:21,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 938033453, now seen corresponding path program 32 times [2023-08-30 20:33:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:21,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676628262] [2023-08-30 20:33:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:21,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676628262] [2023-08-30 20:33:21,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676628262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828613220] [2023-08-30 20:33:21,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:33:21,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:21,865 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:21,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 20:33:21,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:33:21,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:33:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:22,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:22,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828613220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:22,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:22,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-08-30 20:33:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986620963] [2023-08-30 20:33:22,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:33:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:33:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:33:22,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 126 [2023-08-30 20:33:22,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 5476 transitions, 216145 flow. Second operand has 21 states, 21 states have (on average 54.57142857142857) internal successors, (1146), 21 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:22,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:22,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 126 [2023-08-30 20:33:22,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:32,217 INFO L130 PetriNetUnfolder]: 16865/32031 cut-off events. [2023-08-30 20:34:32,217 INFO L131 PetriNetUnfolder]: For 2626644/2626644 co-relation queries the response was YES. [2023-08-30 20:34:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476366 conditions, 32031 events. 16865/32031 cut-off events. For 2626644/2626644 co-relation queries the response was YES. Maximal size of possible extension queue 2405. Compared 316434 event pairs, 139 based on Foata normal form. 20/32051 useless extension candidates. Maximal degree in co-relation 472781. Up to 9892 conditions per place. [2023-08-30 20:34:33,042 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 679 selfloop transitions, 5083 changer transitions 64/5826 dead transitions. [2023-08-30 20:34:33,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 5826 transitions, 234614 flow [2023-08-30 20:34:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 20:34:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 20:34:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3684 transitions. [2023-08-30 20:34:33,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2023-08-30 20:34:33,048 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3684 transitions. [2023-08-30 20:34:33,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3684 transitions. [2023-08-30 20:34:33,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:33,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3684 transitions. [2023-08-30 20:34:33,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.5625) internal successors, (3684), 64 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:33,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:33,060 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:33,060 INFO L175 Difference]: Start difference. First operand has 631 places, 5476 transitions, 216145 flow. Second operand 64 states and 3684 transitions. [2023-08-30 20:34:33,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 5826 transitions, 234614 flow Killed by 15